The number of paper sets is not fixed in any board exams that entirely depend on the exam board's decision across all districts in India. However, for the U.P. Board exams for 10th and 12th grades, there are generally at least seven sets available when the exam begins. This number can vary and may be more or fewer than seven.

How Many Sets of Papers are in U.P. Board Exam Class 10?
The U.P. Board Exam for Class 10 has released 7 to 15 sets of question papers, which include 7 major sets divided by subject to distribute by districts.
How Many Sets of Papers are in U.P. Board Exam Class 12?
The U.P. Board Exam for Class 12 sets are much similler like 10th exam sets that also has released 7 to 15 sets of question papers, which include 7 major sets divided by subject to distribute by districts. As we know, the set number of exam papers depends on the board's decision, so it may change according to the requirement (it is just general data that is not verified by the exam board).